[ltp] Battery draining ove 16W cause battery death in 1 or 2
month
wbonx
linux-thinkpad@linux-thinkpad.org
Sat, 11 Jul 2009 21:48:56 +0200
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Hi,
thank you for the answer.
I know really good thinkwiki.org, I have also posted something, time ago.
As I told you I'm using the modules build for IBM hardware, I have tried
different versions and compiled myself the last one, they are working.
I do a typical use of my laptop, deep-drain happens some times but perhaps
once a month.
And usually for Li-ion battery a deepdrain si under 1% not 30%, what is
better to do is to mantein most of the time the battery half charged.
As I told probably the point is how many Watt are drained from the battery,
I need to know if is possible to optimize the work of the 915 (graphic card)
and if is possible to force the system to avoid peaks of power. It is crazy
to drain 20W from a battery designed for 14W.
Optimizing everything I have obtained a consume of 11/12W but just browsing,
when I do something else like seeng a video it goes up to 17W.
I have hard optimized all the system following the advices on thinkwiki.
The Bios is updated.
W.
2009/7/11 Henrique de Moraes Holschuh <hmh@hmh.eng.br>- Show quoted text -
2009/7/11 Henrique de Moraes Holschuh <hmh@hmh.eng.br>
> On Sat, 11 Jul 2009, wbonx wrote:
> > So I bought a new battery, the normal (small not extended), at the start
> > under windows the life was about 2.45h and under linux 1.15h.
> > After one month of usage only under linux the life was degraded, under
> > windws 1.15h and under linux 40minutes.
>
> You like to do full-charge+deep-drain cycles? If you do that to a Li-ION,
> you kill it in 6 months.
>
> > I tried to use the TP_smapi modules on the new battery to prevent damages
> to
> > battery customizing the charge, but no way, now is almost unusable.
>
> Deep drains (drop battery below 30%) are FAR more damaging than full
> charges. Maybe that's not your problem, but the other complains of this
> type I have seen either involved a lot of deep drains, or crappy battery
> cells and packs bought from third-party dealers in the Internet.
>
> > The battery is designed to give no more then 14W, is it possible that the
>
> Yes, high drain might cause more wear, but not to the degree you see AFAIK.
> That said, you probably should pay a visit to thinkwiki.org, and read up
> everything you can. Then, fix whatever configuration problem you have that
> causes that high a drain...
>
> > problem under linux is that there are not IBM drivers that manage the
> power
> > drain preventing it to excheed the 14W limit of the battery?
>
> There are Linux drivers that manage *most* of what IBM drivers can, and the
> BIOS does a lot of it by itself (which reminds me: upgrade to the latest
> BIOS if you want any sort of support from the kernel people like me). This
> doesn't mean these drivers are working fine on your setup, though.
>
> Also, for Linux it is important that you disable in BIOS stuff you don't
> need often (serial ports, IR, modem, whatever). Linux is not good at
> powering down devices, in fact, it is quite retarded in that area (mostly
> because half the devices out there have hardware bugs and die horrible
> deaths that can only be ressurected by a full hardware reset when you power
> them down).
>
> > I know the tipical advices on how to mantain a battery, the point is that
> > for sure the battery are died cause of a wrong power managing under
> linux,
> > but actually I don't know what to do to solve the problem.
>
> So, you don't do more than one deep drain every 10 or so cycles?
>
> --
> "One disk to rule them all, One disk to find them. One disk to bring
> them all and in the darkness grind them. In the Land of Redmond
> where the shadows lie." -- The Silicon Valley Tarot
> Henrique Holschuh
>
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Hi,<br>thank you for the answer.<br><br>I know really good <a href=3D"http:=
//thinkwiki.org">thinkwiki.org</a>, I have also posted something, time ago.=
<br>As
I told you I'm using the modules build for IBM hardware, I have tried
different versions and compiled myself the last one, they are working.<br>
<br>I do a typical use of my laptop, deep-drain happens some times but perh=
aps once a month.<br>And
usually for Li-ion battery a deepdrain si under 1% not 30%, what is
better to do is to mantein most of the time the battery half charged.<br>
<br>As I told probably the point is how many Watt are drained from the
battery, I need to know if is possible to optimize the work of the 915
(graphic card) and if is possible to force the system to avoid peaks of
power. It is crazy to drain 20W from a battery designed for 14W.<br>
Optimizing everything I have obtained a consume of 11/12W but just
browsing, when I do something else like seeng a video it goes up to 17W.<br=
><br>I have hard optimized all the system following the advices on thinkwik=
i.<br>
The Bios is updated.<br><br>W.<br><br>2009/7/11 Henrique de Moraes Holschuh=
<span dir=3D"ltr"><<a href=3D"mailto:hmh@hmh.eng.br" target=3D"_blank">=
hmh@hmh.eng.br</a>></span><div><span id=3D"q_12269d866ee3b972_1" class=
=3D"h4">- Show quoted text -</span></div>
<br><br><div class=3D"gmail_quote">2009/7/11 Henrique de Moraes Holschuh <s=
pan dir=3D"ltr"><<a href=3D"mailto:hmh@hmh.eng.br">hmh@hmh.eng.br</a>>=
;</span><br><blockquote class=3D"gmail_quote" style=3D"border-left: 1px sol=
id rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class=3D"im">On Sat, 11 Jul 2009, wbonx wrote:<br>
> So I bought a new battery, the normal (small not extended), at the sta=
rt<br>
> under windows the life was about 2.45h and under linux 1.15h.<br>
> After one month of usage only under linux the life was degraded, under=
<br>
> windws =A01.15h and under linux 40minutes.<br>
<br>
</div>You like to do full-charge+deep-drain cycles? =A0If you do that to a =
Li-ION,<br>
you kill it in 6 months.<br>
<div class=3D"im"><br>
> I tried to use the TP_smapi modules on the new battery to prevent dama=
ges to<br>
> battery customizing the charge, but no way, now is almost unusable.<br=
>
<br>
</div>Deep drains (drop battery below 30%) are FAR more damaging than full<=
br>
charges. =A0Maybe that's not your problem, but the other complains of t=
his<br>
type I have seen either involved a lot of deep drains, or crappy battery<br=
>
cells and packs bought from third-party dealers in the Internet.<br>
<div class=3D"im"><br>
> The battery is designed to give no more then 14W, is it possible that =
the<br>
<br>
</div>Yes, high drain might cause more wear, but not to the degree you see =
AFAIK.<br>
That said, you probably should pay a visit to <a href=3D"http://thinkwiki.o=
rg" target=3D"_blank">thinkwiki.org</a>, and read up<br>
everything you can. =A0Then, fix whatever configuration problem you have th=
at<br>
causes that high a drain...<br>
<div class=3D"im"><br>
> problem under linux is that there are not IBM drivers that manage the =
power<br>
> drain preventing it to excheed the 14W limit of the battery?<br>
<br>
</div>There are Linux drivers that manage *most* of what IBM drivers can, a=
nd the<br>
BIOS does a lot of it by itself (which reminds me: upgrade to the latest<br=
>
BIOS if you want any sort of support from the kernel people like me). =A0Th=
is<br>
doesn't mean these drivers are working fine on your setup, though.<br>
<br>
Also, for Linux it is important that you disable in BIOS stuff you don'=
t<br>
need often (serial ports, IR, modem, whatever). =A0Linux is not good at<br>
powering down devices, in fact, it is quite retarded in that area (mostly<b=
r>
because half the devices out there have hardware bugs and die horrible<br>
deaths that can only be ressurected by a full hardware reset when you power=
<br>
them down).<br>
<div class=3D"im"><br>
> I know the tipical advices on how to mantain a battery, the point is t=
hat<br>
> for sure the battery are died cause of a wrong power managing under li=
nux,<br>
> but actually I don't know what to do to solve the problem.<br>
<br>
</div>So, you don't do more than one deep drain every 10 or so cycles?<=
br>
<br>
--<br>
=A0"One disk to rule them all, One disk to find them. One disk to bri=
ng<br>
=A0them all and in the darkness grind them. In the Land of Redmond<br>
=A0where the shadows lie." -- The Silicon Valley Tarot<br>
<font color=3D"#888888"> =A0Henrique Holschuh<br>
</font></blockquote></div><br>
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